16947328 has 32 divisors (see below), whose sum is σ = 34859520. Its totient is φ = 8198400.

The previous prime is 16947299. The next prime is 16947377. The reversal of 16947328 is 82374961.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833 + ... + 6103.

It is an arithmetic number, because the mean of its divisors is an integer number (1089360).

It is a vampire number, since it can be written as 3968 ⋅ 4271 (with its own digits).

Almost surely, 2^16947328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16947328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17429760).

16947328 is an abundant number, since it is smaller than the sum of its proper divisors (17912192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16947328 is an equidigital number, since it uses as much as digits as its factorization.

16947328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316 (or 4304 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 16947328 is about 4116.7132520981. The cubic root of 16947328 is about 256.8623263994.

The spelling of 16947328 in words is "sixteen million, nine hundred forty-seven thousand, three hundred twenty-eight".